smtp.fialanet.cz has no NS records.
NS records for this zone are defined at fialanet.cz.
NS records for this zone are defined at fialanet.cz.
Question and response
Question
dig smtp.fialanet.cz. NS
Answer
The response has no answer records.
Authority
fialanet.cz. 3600 SOA ns.grdns.cz. admin.forpsi.com. 2026030701 14400 3600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0